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Question 3281

Topic: Shoulder & Hip Sports

A 68-year-old woman with a massive, retracted rotator cuff tear involving the supraspinatus and entire infraspinatus presents with 'pseudoparalysis' of forward elevation. In the setting of an intact subscapularis, this pseudoparalysis indicates a disruption of which biomechanical force couple?

. Coronal plane force couple (Deltoid and inferior rotator cuff)
. Transverse plane force couple (Subscapularis and infraspinatus)
. Sagittal plane force couple (Pectoralis major and latissimus dorsi)
. Scapulothoracic force couple (Trapezius and serratus anterior)
. Axial plane force couple (Teres major and teres minor)

Correct Answer & Explanation

. Coronal plane force couple (Deltoid and inferior rotator cuff)


Explanation

The coronal plane force couple consists of the deltoid (creating a superior sheer force) and the inferior rotator cuff (creating an inferior compressive force). Disruption of the inferior cuff (infraspinatus/teres minor) allows unopposed superior migration by the deltoid, resulting in pseudoparalysis.

Question 3282

Topic: 5. Sports Medicine

Which of the following factors is considered the strongest predictor of a prolonged recovery (post-concussion syndrome) following a sports-related concussion?

. Loss of consciousness at the time of impact
. Presence of retrograde amnesia
. Severity of initial symptoms in the first few days post-injury
. Male sex
. Age greater than 25 years

Correct Answer & Explanation

. Severity of initial symptoms in the first few days post-injury


Explanation

The severity and number of initial symptoms reported in the first few days following a concussion is the most consistent and strongest predictor of a prolonged recovery. Loss of consciousness and amnesia are not strongly predictive of prolonged symptom duration.

Question 3283

Topic: Shoulder & Hip Sports

When evaluating a patient for a rotator cuff repair, preoperative MRI is used to assess muscle quality via the Goutallier classification. Which Goutallier stage is defined as having equal amounts of fat and muscle within the rotator cuff muscle belly?

. Stage 1
. Stage 2
. Stage 3
. Stage 4
. Stage 5

Correct Answer & Explanation

. Stage 4


Explanation

In the Goutallier classification of fatty infiltration: Stage 1 is some fatty streaks; Stage 2 is more muscle than fat; Stage 3 is equal amounts of fat and muscle; and Stage 4 is more fat than muscle. Stages 3 and 4 generally portend poor structural outcomes after repair.

Question 3284

Topic: 5. Sports Medicine
A 21-year-old collegiate hockey player sustains an isolated grade III tear of the medial collateral ligament (MCL) at its femoral insertion. There is no meniscal or cruciate ligament pathology. What is the most appropriate initial management?
. Immediate surgical repair of the MCL with suture anchors
. Surgical reconstruction of the MCL using a hamstring autograft
. Hinged knee brace with protected weight-bearing and early range of motion
. Cylinder cast immobilization in full extension for 6 weeks
. Immobilization in a hinged brace locked at 90 degrees of flexion for 4 weeks

Correct Answer & Explanation

. Hinged knee brace with protected weight-bearing and early range of motion


Explanation

Isolated Grade III MCL tears, even those at the femoral insertion, have an excellent capacity for healing non-operatively. The gold standard treatment is a hinged knee brace allowing early controlled range of motion and progressive weight-bearing.

Question 3285

Topic: Shoulder & Hip Sports

The rotator cuff interval is a triangular anatomic space in the anterior shoulder bounded by the supraspinatus superiorly, the subscapularis inferiorly, and the coracoid process medially. Which of the following structures passes through this interval?

. Short head of the biceps tendon
. Coracoacromial ligament
. Long head of the biceps tendon
. Axillary nerve
. Middle glenohumeral ligament

Correct Answer & Explanation

. Long head of the biceps tendon


Explanation

The rotator cuff interval contains the long head of the biceps tendon, the coracohumeral ligament (CHL), and the superior glenohumeral ligament (SGHL). It is bordered by the supraspinatus, subscapularis, and the base of the coracoid.

Question 3286

Topic: Knee Sports

The posterior cruciate ligament (PCL) is composed of two primary functional bundles. In which position of the knee is the anterolateral (AL) bundle of the PCL at its maximum tension?

. Full extension
. 30 degrees of flexion
. 90 degrees of flexion
. 120 degrees of flexion
. Internal rotation at 0 degrees

Correct Answer & Explanation

. 90 degrees of flexion


Explanation

The anterolateral (AL) bundle of the PCL is the larger bundle and is tightest in knee flexion (around 90 degrees). Conversely, the posteromedial (PM) bundle is tightest in full extension.

Question 3287

Topic: 5. Sports Medicine

Superior Capsular Reconstruction (SCR) is a joint-preserving surgical option for massive, irreparable posterosuperior rotator cuff tears. In this procedure, the graft is anchored medially to the superior glenoid and laterally to the:

. Lesser tuberosity
. Greater tuberosity
. Coracoid process
. Acromion
. Subscapularis footprint

Correct Answer & Explanation

. Greater tuberosity


Explanation

In Superior Capsular Reconstruction (SCR), an allograft or autograft is attached medially to the superior glenoid rim and laterally to the greater tuberosity. This static restraint helps prevent superior migration of the humeral head.

Question 3288

Topic: Knee Sports

A 28-year-old football player sustains a severe varus and hyperextension injury to his knee, resulting in a posterolateral corner (PLC) injury. Post-injury, he complains of numbness over the dorsum of his foot and an inability to dorsiflex his ankle. Which nerve is most likely injured?

. Tibial nerve
. Common peroneal nerve
. Saphenous nerve
. Deep peroneal nerve isolated
. Sural nerve

Correct Answer & Explanation

. Common peroneal nerve


Explanation

The common peroneal nerve is highly susceptible to traction injury during a varus and hyperextension insult that damages the posterolateral corner of the knee. Injury to this nerve results in foot drop and paresthesias over the dorsal aspect of the foot.

Question 3289

Topic: Shoulder & Hip Sports

Massive retraction of a supraspinatus tear medial to the glenoid rim significantly increases the risk of traction neuropathy to the suprascapular nerve. At which anatomic location does this traction most commonly tether and compress the nerve?

. Suprascapular notch
. Spinoglenoid notch
. Quadrilateral space
. Triangular interval
. Coracoid process

Correct Answer & Explanation

. Suprascapular notch


Explanation

When the supraspinatus tendon retracts medially, it creates an abnormal traction force on the suprascapular nerve as it passes under the transverse scapular ligament at the suprascapular notch. Compression at the spinoglenoid notch more commonly affects the infraspinatus branch only (e.g., from a paralabral cyst).

Question 3290

Topic: 5. Sports Medicine

The acute neurometabolic cascade of a sports-related concussion begins immediately following biomechanical injury to the brain. This initial phase is characterized by an abrupt release of excitatory neurotransmitters (like glutamate) and a massive cellular efflux of which ion?

. Calcium
. Potassium
. Sodium
. Magnesium
. Chloride

Correct Answer & Explanation

. Potassium


Explanation

The initial neurometabolic cascade in concussion is marked by indiscriminate release of glutamate, leading to massive efflux of intracellular potassium (K+) and influx of calcium (Ca2+). The Na+/K+ pump then requires massive ATP to restore homeostasis, causing a relative energy crisis.

Question 3291

Topic: Knee Sports

The anterior cruciate ligament (ACL) is anatomically composed of two bundles named for their tibial insertion sites. Which bundle is primarily responsible for rotational stability and is tightest in knee extension?

. Anteromedial bundle
. Posterolateral bundle
. Anterolateral bundle
. Posteromedial bundle
. Intermediate bundle

Correct Answer & Explanation

. Posterolateral bundle


Explanation

The posterolateral (PL) bundle of the ACL is tightest in full extension and is the primary restraint to rotatory loads (e.g., pivot shift). The anteromedial (AM) bundle is tightest in flexion and primarily restricts anterior tibial translation.

Question 3292

Topic: 5. Sports Medicine

A 19-year-old collegiate soccer player sustains a concussion during a game. She undergoes a period of rest and is completely asymptomatic at rest 48 hours later. According to the standard graduated return-to-play protocol, what is the next step in her management?

. Full contact practice
. Light aerobic exercise
. Sport-specific exercise
. Non-contact training drills
. Complete cognitive rest for an additional week

Correct Answer & Explanation

. Light aerobic exercise


Explanation

The graduated return-to-play protocol requires players to be completely asymptomatic before beginning. The first active stage following the rest period is light aerobic exercise, which then progresses sequentially to sport-specific exercise, non-contact drills, full-contact practice, and finally normal game play.

Question 3293

Topic: Knee Sports

A 25-year-old rugby player falls directly onto his flexed right knee. Examination reveals a positive posterior drawer test at 90 degrees of flexion. The dial test demonstrates 20 degrees of increased external rotation at 30 degrees of flexion, and 25 degrees of increased external rotation at 90 degrees of flexion compared to the contralateral knee. Which structures are injured?

. PCL alone
. PCL and ACL
. PCL and Posterolateral Corner (PLC)
. PLC alone
. MCL and ACL

Correct Answer & Explanation

. PCL and Posterolateral Corner (PLC)


Explanation

Increased external rotation isolated to 30 degrees of flexion indicates a posterolateral corner (PLC) injury. When the external rotation remains increased at both 30 and 90 degrees of flexion, it indicates a combined PCL and PLC injury.

Question 3294

Topic: Shoulder & Hip Sports

A 35-year-old elite tennis player presents with a PASTA (Partial Articular Supraspinatus Tendon Avulsion) lesion involving 60% of the tendon footprint depth. He has failed 6 months of conservative management. What is the most appropriate surgical treatment?

. Arthroscopic debridement alone
. Subacromial decompression alone
. In situ repair or tear completion and repair
. Biceps tenodesis
. Latissimus dorsi transfer

Correct Answer & Explanation

. In situ repair or tear completion and repair


Explanation

For high-grade articular-sided partial rotator cuff tears (involving >50% of the tendon thickness), surgical intervention typically requires either tear completion and formal repair, or an in situ repair, to adequately restore footprint biomechanics.

Question 3295

Topic: 5. Sports Medicine

A high school football player returns to play before completely resolving symptoms from a prior concussion. He sustains a seemingly minor blow to the head and rapidly collapses, progressing to a coma. This catastrophic cascade (Second Impact Syndrome) is primarily driven by:

. Acute epidural hematoma
. Acute subdural hematoma
. Loss of cerebral autoregulation leading to massive brain swelling
. Diffuse axonal injury
. Internal carotid artery dissection

Correct Answer & Explanation

. Loss of cerebral autoregulation leading to massive brain swelling


Explanation

Second Impact Syndrome occurs when a second head injury is sustained before the brain recovers from the first. It causes a catastrophic loss of cerebral autoregulation, leading to rapid vascular engorgement, massive brain swelling, and potential herniation.

Question 3296

Topic: 5. Sports Medicine

When utilizing a bone-patellar tendon-bone (BTB) autograft for ACL reconstruction, placing the femoral tunnel too anteriorly (shallow) within the intercondylar notch will result in which of the following kinematic abnormalities?

. Increased graft tension in flexion
. Increased graft tension in extension
. Laxity in both flexion and extension
. Patella baja
. Premature posteromedial compartment osteoarthritis

Correct Answer & Explanation

. Increased graft tension in flexion


Explanation

Placing the ACL femoral tunnel too anteriorly (shallow) in the notch results in a graft that becomes excessively tight in flexion and loose in extension, leading to a marked loss of knee flexion.

Question 3297

Topic: 5. Sports Medicine
A 22-year-old collegiate skier sustains an isolated grade III MCL tear of the left knee. There is valgus gapping at both 0 and 30 degrees, but ACL and PCL are intact on MRI. Which of the following represents the most widely accepted initial management?
. Immediate primary open surgical repair
. Surgical reconstruction with a hamstring autograft
. Hinged knee brace protecting against valgus stress with early range of motion
. Cylinder cast immobilization for 6 weeks
. Immediate return to play with athletic taping

Correct Answer & Explanation

. Hinged knee brace protecting against valgus stress with early range of motion


Explanation

Isolated Grade I, II, and the vast majority of Grade III MCL injuries are successfully treated non-operatively. A hinged knee brace that protects against valgus stress while allowing early range of motion yields excellent long-term functional outcomes.

Question 3298

Topic: 5. Sports Medicine

Which of the following components of the SCAT5 (Sport Concussion Assessment Tool 5) is utilized specifically to assess an athlete's immediate memory?

. Finger-to-nose coordination test
. Reciting the months of the year in reverse order
. Reading a list of 5 or 10 words and having the athlete repeat them
. Modified Balance Error Scoring System (mBESS)
. Glasgow Coma Scale (GCS) assessment

Correct Answer & Explanation

. Reading a list of 5 or 10 words and having the athlete repeat them


Explanation

Immediate memory in the SCAT5 is tested using a word recall test where the examiner reads a list of words and the athlete must repeat back as many as possible. Concentration is assessed differently, typically by reciting digits backwards or months in reverse.

Question 3299

Topic: Knee Sports

A 26-year-old male presents for a revision ACL reconstruction. Preoperative CT scan demonstrates extensive femoral and tibial tunnel osteolysis, with both tunnels measuring 16 mm in diameter. What is the most appropriate next step in management?

. Single-stage revision utilizing a 10 mm bone-patellar tendon-bone graft
. Single-stage revision with a synthetic ligament graft
. Two-stage revision involving initial hardware removal and bone grafting of the tunnels
. Non-operative management with a functional unloader brace
. High tibial osteotomy

Correct Answer & Explanation

. Two-stage revision involving initial hardware removal and bone grafting of the tunnels


Explanation

Tunnel widening greater than 14-15 mm typically necessitates a two-stage revision strategy. The first stage involves hardware removal and bone grafting of the expanded tunnels, followed by the definitive revision ACL reconstruction 4-6 months later once the bone graft has incorporated.

Question 3300

Topic: Shoulder & Hip Sports

During an arthroscopic rotator cuff repair, extensive medial mobilization of a massive, chronically retracted supraspinatus tear is required. Which neurological structure is at greatest risk of injury during this mobilization, particularly if releasing the coracohumeral ligament near the base of the coracoid?

. Axillary nerve
. Musculocutaneous nerve
. Suprascapular nerve
. Spinal accessory nerve
. Long thoracic nerve

Correct Answer & Explanation

. Suprascapular nerve


Explanation

The suprascapular nerve is at risk during extensive medial mobilization of the supraspinatus and release around the superior transverse scapular ligament. It courses approximately 1-2 cm medial to the superior glenoid rim at the base of the coracoid process.